There are several in Harris County. One I am immediately familiar with is in the area on the northeast side bordered by Halls Bayou, Little York, Hirsch, and US 59 North. The neighborhood was destroyed by Halls Bayou during TS Allison. I beleieve the government bought them out, razed the area, and broke up the streets to where the neighborhood is not accessible by vehicles. The whole area has gone to seed and is a haven for illegal dumping and is a pretty rough and dangerous area. I live not too far from it and I wouldn't go exploring down there. I think there is another thread about this somewhere.